Sandwich structured cutter and personal hair trimmer using the same

Abstract

The disclosure provides a sandwich structured cutter, which includes two fixed blades and a reciprocating blade sandwiched between the two fixed blades; edges of front ends of both the two fixed blades are provided with a row of comb teeth, an inner surface of each comb tooth contacting the reciprocating blade forms an acute angle with a lateral edge of the comb tooth; an edge of a front end of the reciprocating blade is provided with a row of cutting teeth with cutting edges; the edges of the front ends of the two fixed blades are overlapped with each other, the edge of the front end of the reciprocating blade is sandwiched between the edges of the front ends of the two fixed blades and is not exposed out of the edge of the front end of any one fixed blade.

What is claimed is: 
     
       1. A sandwich structured cutter, wherein the sandwich structured cutter comprises two fixed blades and a reciprocating blade sandwiched between the two fixed blades, edges of front ends of both the two fixed blades are provided with a row of comb teeth, an inner surface of each comb tooth contacting the reciprocating blade forms an acute angle with a lateral edge of the comb tooth, an edge of a front end of the reciprocating blade is provided with a row of cutting teeth having cutting edges, the edges of the front ends of the two fixed blades are overlapped with each other, the edge of the front end of the reciprocating blade is sandwiched between the edges of the front ends of the two fixed blades, and the edge of the front end of the reciprocating blade is not exposed out of the edge of the front end of any one fixed blade, and the reciprocating blade is drivable, so that the edge of the front end of the reciprocating blade thereof makes reciprocating motion relative to the edges of the front ends of the two fixed blades, thereby realizing trimming of hairs,
 wherein a cross section of the cutting tooth of the reciprocating blade, which is perpendicular to the length direction of the reciprocating blade, is of a parallelogram, and upper and lower opposite sides of the parallelogram align and close to corresponding inner surfaces of the comb teeth of the two fixed blades respectively, and 
 wherein two opposite acute angles of the parallelogram define two cutting edges of the cutting tooth. 
 
     
     
       2. The cutter according to  claim 1 , wherein all of the cutting teeth of the reciprocating blade are arranged in a same direction. 
     
     
       3. The cutter according to  claim 2 , wherein each of the cutting teeth of the reciprocating blade is arranged to be perpendicular to the edge of the front end of the reciprocating blade, or, each of the cutting teeth of the reciprocating blade is arranged to be inclined in a same direction at a same angle with respect to the edge of the front end of the reciprocating blade. 
     
     
       4. The cutter according to  claim 1 , wherein the parallelograms of every two adjacent cutting teeth of the reciprocating blade are inclined towards each other, such that, on upper and lower ends of the every two adjacent cutting teeth, the cutting teeth are close to each other on one end while the cutting teeth are far away from each other on the other end to form a trapezoid construction. 
     
     
       5. The cutter according to  claim 1 , wherein the two fixed blades are of a teeth overlapped structure, that is, the comb teeth of one fixed blade are overlapped with the comb teeth of the other fixed blade in a one-to-one correspondence manner, and gaps between the comb teeth of one fixed blade also are overlapped with gaps between the comb teeth of the other fixed blade in a one-to-one correspondence manner. 
     
     
       6. The cutter according to  claim 1 , wherein the two fixed blades are of a teeth staggered structure, that is, the comb teeth of one fixed blade are overlapped with the gaps between the comb teeth of the other fixed blade in a one-to-one correspondence manner. 
     
     
       7. A personal hair trimmer, comprising a main body assembly and a blade set, the blade set comprising a cutter composed of a reciprocating blade and a fixed blade, and a drive mechanism used for driving the reciprocating blade being arranged inside the main body assembly; wherein the cutter is of a sandwich structure, which comprises two fixed blades and a reciprocating blade sandwiched between the two fixed blades, edges of front ends of both the two fixed blades are provided with a row of comb teeth, an inner surface of each comb tooth contacting the reciprocating blade forms an acute angle with a lateral edge of the comb tooth, an edge of a front end of the reciprocating blade is provided with a row of cutting teeth having cutting edges, the edges of the front ends of the two fixed blades are overlapped with each other, the edge of the front end of the reciprocating blade is sandwiched between the edges of the front ends of the two fixed blades and is not exposed out of the edge of the front end of any one fixed blade, and the reciprocating blade is driven by the drive mechanism, so that the edge of the front end thereof makes reciprocating motion with respect to the edges of the front ends of the two fixed blades, thereby realizing trimming of hairs,
 wherein a cross section of the cutting tooth of the reciprocating blade, which is perpendicular to the length direction of the reciprocating blade, is of a parallelogram, and upper and lower opposite sides of the parallelogram are attached onto corresponding inner surfaces of the comb teeth of the two fixed blades respectively, and 
 wherein two opposite acute angles of the parallelogram define two cutting edges of the cutting tooth. 
 
     
     
       8. The personal hair trimmer according to  claim 7 , wherein all of the cutting teeth of the reciprocating blade are arranged in a same direction, each of the cutting teeth of the reciprocating blade is arranged to be perpendicular to the edge of the front end of the reciprocating blade, or, each of the cutting teeth of the reciprocating blade is arranged to be inclined in a same direction at a same angle with respect to the edge of the front end of the reciprocating blade; every two adjacent cutting teeth of the reciprocating blade are inclined towards each other, such that, on upper and lower ends of the every two adjacent cutting teeth, the cutting teeth are close to each other on one end while the cutting teeth are far away from each other on the other end to form a trapezoid construction; the two fixed blades are of a teeth overlapped structure, that is, the comb teeth of one fixed blade are overlapped with the comb teeth of the other fixed blade in a one-to-one correspondence manner, and gaps between the comb teeth of one fixed blade also are overlapped with gaps between the comb teeth of the other fixed blade in a one-to-one correspondence manner; or, the two fixed blades are of a teeth staggered structure, that is, the comb teeth of one fixed blade are overlapped with the gaps between the comb teeth of the other fixed blade in a one-to-one correspondence manner.